Instrument for adjusting the teeth



oct. 4, 1932. R, KAWRETZKE 1,881,196

INSTRUMENT FOR ADJUSIING THE TEETH Filed Nov. 4, 1930 VPatented `Oct. 4,1932 UNITED As'ra'rns PATENT OFFICE- RoBnnm KAWRETZKE, or xLosTER,WENNIGSEN 1N Dnrs'rnn, GERMANY INSTRUMENT non, ADJUSTING THE TEETHApplication led November 4, 1930, Serial N o. 493,477, and in GermanyNovember 8, 1929.

. forindicating the relative' spacing of they jaws. Y Y V.f Anembodiment of the invention is illus- 151 trated by way of example inthe accompanying drawing in which Fig. l is a side elevation and Fig. 2a plan to a larger scale. 'Figure 3 is a sectional view of spindle 5.Figure 4 kis a fragmentary top plan view of a portion of the yoke and aportion of the spindle.

The instrument has a handle 1 and a yoke 2 at one end of which isdisposed the jaw 3 to press against the tooth to be adjusted orstraightened and at the opposite endk yof which is fitted the jaw 4forming an abutment and movable longitudinally by operation. of ascrew-threaded spindle. YThe jaw 4 is interchangeably secured to a pin 6of rectangu- 80 lar section which has a` ball-and-socket connection 7with thefspindle 5. The jaw l3 is Y similarly mounted on a pin ofrectangular section having a ball-and-socket fitting and being adaptedto be secured by a screwso that, when the instrument ispositioned infront of and behind the teeth, in consequence Y of theball-and-socket-connections the jaws 'f 3 and 4 automaticallyaccommodate themselves to the position ofthe teeth and can be secured bylloc-king theball joints by turning the knobs 8, the friction involvedbeing backed up by compression springs 9. The screwing up of the jaw4 iseiiected by aid of a milled nut 10 received in a slot 11 formed in theyoke. In order to effect only longitudinal movement of the spindle5 whenturning the nut 10, the spindle is secured against rotation in itsbearings by milling a li'at 12 thereon. Inorder to indicate the spacingof the jaws 3, 4 the fiat 12 on the spindle and theA nut 10 are providedwith graduated 'scales as usual in micrometer gauges, as

shown in Figure 4.

l It is essential that the jaws 4 shall as far as possible engage onlythe teeth adjacent to the tooth to be treated and that, further, thejaws which are universally mounted may be secured in any givenpositionoi' adjustment. i I claim l l. An, instrument for adjustingteeth including a yoke having a handle, the yoke being formed with asocket, a pin having a ball insertible into the socket, a jaw detachablymounted upon the pin, a spring in the yoke bearing `against said ball,and adjustable means bearing against the spring to bind it within thesocket to thus hold the ball, pin and jaw in adjusted positions.

2. An instrument for adjusting the teeth comprising a bifurcated yokehaving a hany dle, one end of the yoke being Jformed with a socket, apin having a ball insertible into the socket, a jaw detachably carriedby the pin, the ball and socket permitting the jaw to be adjusted intovarious angular relations to the yoke, means for holding the jaw in anyadjusted position, a spindle extending through the opposite end of theyoke and having screw-threads, thespindle being held in the yoke fromrotating movement, a nut engaging the screw-threads of the spindle andheld from longitudinal movement by the yoke whereby the spindle may beadjusted toward or fromthe opposite end of the yoke, the spindle beingformed with a socket, a pin having a ball insertible within the socket,a jaw detachably mounted upon the pin, and means for holding the pin inany angularly adjusted position with relation to the spindle.

3. An instrument for adjusting the teeth comprising a bifurcated yokehaving a handle, one end of the yoke being formed with a socket, a pinhaving a ball insertible into the 95 socket, a jaw detachably carried bythe pin, the ball and socket permitting the jaw to be adjustedintovarious angular relations to the yoke, means :tor holding the jaw inany adjusted position, a spindle extending 2j@ signature.

i th'roughfthe opposite end of the yoke and I having screw-threads, thespindle being heldV inthe yoke fromrotating movement, a nut engagingtheVsereW-threads of the spindle and held from` longitudinalmovement-,by the vyoke whereby the spindle may be adjusted toward or`irromthe opposite endv of theyoke,

V*the Spindle being formed With airsoeket,VK a

pin having a ball insertible Within the sokt, Y

a jaw detachably mounted upon the pin, and

Ymeans for holding the'rpinin-any lamguiarlyv -V v 'f adjusted positionWith relationtothev ySpindie, the last namedfj aW'eXtendingtransvei's-e-- l' Y1y of the spindle andV being curved onA its face 1 Yy oonfionting lthe oppositejavv, the oppoSite jaw h'avinga'wdth lessthan ythe lengthof the irst=nlamed .j avv and being dispo-sed in alplane midway of the firstfnarned jaw. y

In testimony whereof I hereunto ax vmy

